WO2023112566A1

WO2023112566A1 - Air-conditioner, refrigerator, and transport container

Info

Publication number: WO2023112566A1
Application number: PCT/JP2022/041900
Authority: WO
Inventors: 憲人渋谷; 渉平田
Original assignee: ダイキン工業株式会社
Priority date: 2021-12-14
Filing date: 2022-11-10
Publication date: 2023-06-22
Also published as: JP2023087868A; JP7348546B2

Abstract

This air-conditioner comprises: a gas separation membrane (124) to which a gas to be processed is supplied; and a controller (191) for performing a first operation for limiting a decrease in the performance of the gas separation membrane due to the air-conditioner being stopped for a designated period of time.

Description

Air conditioners, refrigeration equipment, and shipping containers

The present disclosure relates to air conditioners, refrigerators, and shipping containers.

Patent Literature 1 discloses an air conditioning device that adjusts the composition of the internal air in the internal space. An air conditioner includes a gas separation membrane. When the air to be treated flows through the gas separation membrane, some components (for example, oxygen and carbon dioxide) in the air to be treated permeate the gas separation membrane. The air whose composition has been adjusted in this manner is supplied to the internal space.

JP 2019-66169 A

If the air conditioner as described in Patent Document 1 is stopped for a long period of time, the separation membrane will shrink and the pores of the separation membrane will become smaller. As a result, there is a problem that the performance of the separation membrane deteriorates.

The purpose of the present disclosure is to suppress the performance deterioration of the separation membrane due to the shutdown of the air conditioner.

A first aspect is an air conditioning device that adjusts the composition of internal air in an internal space (5),
A gas separation membrane (124) to which the air to be treated is supplied, and a control unit (191) for executing a first operation for suppressing deterioration of the performance of the gas separation membrane (124) due to stoppage of the air conditioner for a predetermined period. ).

It should be noted that the meaning of "suppressing the deterioration of the performance of the separation membrane" here also includes recovering the performance of the separation membrane when the performance of the separation membrane has deteriorated.

In the first aspect, the performance of the gas separation membrane (124) can be suppressed from deteriorating due to the stoppage of the air conditioner for a predetermined period of time by the control unit (191) executing the first operation.

A second aspect, in the first aspect, includes a preliminary operation in which the first operation supplies the air to be treated to the gas separation membrane (124).

In the second mode, preliminary operation is performed as the first operation, and the air to be treated is supplied to the gas separation membrane (124). The air to be treated flows through the gas separation membrane (124), thereby enlarging the pores of the gas separation membrane (124) and suppressing deterioration of the performance of the gas separation membrane (124).

A third aspect is the second aspect, wherein the control unit (191) starts the preliminary operation after a predetermined time has elapsed since the air conditioning device was stopped.

In the third aspect, the control unit (191) starts the preliminary operation after a predetermined time has elapsed since the air conditioner stopped. This prevents the air to be treated from flowing through the gas separation membrane (124) for a long period of time, thereby suppressing deterioration in the performance of the gas separation membrane (124).

A fourth aspect is the second aspect, wherein the control unit (191) starts the preliminary operation a predetermined time before the start of the normal operation of the air conditioner.

In the fourth aspect, since the preliminary operation is started a predetermined time before the start of normal operation of the air conditioner, deterioration of the performance of the gas separation membrane (124) can be suppressed before normal operation. This can prevent the gas separation membrane (124) from achieving sufficient performance in normal operation.

A fifth aspect is the third or fourth aspect, wherein in the preliminary operation, the first air and the second air separated by the gas separation membrane (124) are discharged to the outside space (6). with road (103).

In the fifth aspect, in preliminary operation, the first air and the second air that have passed through the gas separation membrane (124) are discharged to the outside space (6) via the exhaust flow path (103). Therefore, it is possible to prevent the composition of the air in the internal space (5) from changing due to the execution of the preliminary operation.

A sixth aspect, in any one of the third to fifth aspects, is provided with a heating section (175) for heating the air supplied to the gas separation membrane (124) in the preliminary operation.

In the sixth aspect, in the preliminary operation, the air heated by the heating section (175) is supplied to the gas separation membrane (124). This can improve the effect of recovering the performance of the gas separation membrane (124).

A seventh aspect, in any one of the third to sixth aspects, includes a pressurizing section (110) that pressurizes the air supplied to the gas separation membrane (124) in the preliminary operation.

In the seventh aspect, in the preliminary operation, the air pressurized by the pressurizing section (110) is supplied to the gas separation membrane (124). This can improve the effect of recovering the performance of the gas separation membrane (124).

According to an eighth aspect, in any one of the third to seventh aspects, a dehumidification section (111, 113, 130) is provided to reduce moisture in the air supplied to the gas separation membrane (124) in the preliminary operation. there is

In the eighth aspect, in the preliminary operation, the air whose water content has been reduced in the dehumidification section (111, 113, 130) is supplied to the gas separation membrane (124). As a result, it is possible to suppress deterioration in the performance of the gas separation membrane (124) due to the influence of water molecules in the air during the preliminary operation.

A ninth aspect is any one of the first to eighth aspects, wherein the first operation includes an operation for prompting the person to operate the air conditioner.

In the ninth aspect, the operation of prompting the person to operate the air conditioner is performed, thereby preventing the air conditioner (100) from being stopped for a long period of time. As a result, it is possible to prevent the performance of the gas separation membrane (124) from deteriorating due to the suspension of the air conditioner for a predetermined period.

In a tenth aspect, the control section (191) outputs information regarding the performance of the gas separation membrane (124).

In the tenth aspect, a person such as a user can grasp information about the performance of the gas separation membrane (124).

An eleventh aspect is a refrigeration system comprising the air conditioner (100) of any one of the first to tenth aspects and a refrigerant circuit (30) for adjusting the temperature inside the internal space (5). be.

A twelfth aspect is a shipping container comprising the refrigerating device (10) of the eleventh aspect and a container body (2) provided with the refrigerating device (10).

FIG. 1 is a perspective view of the shipping container of the embodiment as viewed from the front side. FIG. 2 is a schematic longitudinal sectional view showing the internal structure of the shipping container of the embodiment. FIG. 3 is a piping system diagram of a refrigerant circuit of the transport refrigeration system of the embodiment. FIG. 4 is a block diagram showing a schematic configuration of the shipping container of the embodiment. FIG. 5 is a piping system diagram showing the configuration of the air conditioner of the embodiment. FIG. 6 is a schematic cross-sectional view of a gas separation module provided in the air conditioner of the embodiment. FIG. 7 is a schematic cross-sectional view of a water separation module provided in the air conditioner of the embodiment. FIG. 8 is a diagram corresponding to FIG. 5 showing the first operation of the air conditioner of the embodiment. FIG. 9 is a diagram corresponding to FIG. 5 showing the second operation of the air conditioner of the embodiment. FIG. 10 is a diagram corresponding to FIG. 5 showing the third operation of the air conditioner of the embodiment. FIG. 11 is a diagram corresponding to FIG. 5 showing the fourth operation of the air conditioner of the embodiment. FIG. 12 is a diagram corresponding to FIG. 5 showing the fifth operation of the air conditioner of the embodiment. FIG. 13 is a flowchart of control related to determination of start of preliminary operation of the air conditioner of the embodiment. FIG. 14 is a flowchart of control related to preliminary operation of the air conditioner of Modification 1. FIG. FIG. 15 is a diagram corresponding to FIG. 5 of the air conditioner of Modification 2. FIG. FIG. 16 is a diagram corresponding to FIG. 5 showing preliminary operation of the air conditioner of Modification 2. In FIG. FIG. 17 is a diagram corresponding to FIG. 5 of the air conditioner of Modification 3. FIG. FIG. 18 is a flowchart of control regarding the first operation of the air conditioner of Modification 4. FIG. FIG. 19 is a flow chart of control for the second operation of the air conditioner of Modification 5. FIG. FIG. 20 is a diagram corresponding to FIG. 5 of the air conditioner of Modification 6. FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of the present disclosure. Each drawing is for the purpose of conceptually explaining the present disclosure, and therefore dimensions, ratios or numbers may be exaggerated or simplified as necessary for ease of understanding.

(1) Outline of shipping container This disclosure is a shipping container (1). The shipping container (1) is a temperature-controlled reefer container. Shipping containers (1) are used to transport perishables such as fruits, vegetables and flowers. Perishables take in oxygen (O ₂ ) from the air and release carbon dioxide (CO ₂ ).

As shown in FIG. 1, the shipping container (1) comprises a container body (2) and a shipping refrigeration equipment (10) provided in the container body (2). Shipping containers (1) are used for maritime transport. A shipping container (1) is transported by a marine vehicle such as a ship. As shown in Figure 5, the shipping container (1) is equipped with an air conditioner (100). The air conditioner (100) adjusts the composition of the air inside the container body (2).

(2) Container Main Body The container main body (2) is a storage for storing perishables.

The container body (2) is formed in a hollow box shape. The container body (2) is formed horizontally. An opening is formed at one longitudinal end of the container body (2). The opening of the container body (2) is closed by a transportation refrigeration system (10). Inside the container body (2), a storage space (5) is formed as an internal space for storing objects to be transported.

(3) Refrigeration Equipment for Transportation The refrigeration equipment for transportation (10) is attached to the opening of the container body (2). A transportation refrigeration system (10) includes a casing (11) and a refrigerant circuit (30). The transportation refrigeration equipment (10) adjusts the temperature of the air (inside air) in the storage space (5).

(3-1) Casing As shown in FIG. 2, the casing (11) has a partition wall (12) and a partition plate (15).

An internal flow path (20) is formed inside the partition wall (12). An outside chamber (25), which is part of the outside space (6), is formed outside the partition wall (12). The internal flow path (20) and the external chamber (25) are separated by a partition wall (12).

The partition wall (12) includes an outer wall (13) and an inner wall (14). The outer wall (13) of the warehouse is positioned outside the container body (2). The inner wall (14) is positioned inside the container body (2).

The outer wall of the warehouse (13) blocks the opening of the container body (2). The outer wall (13) is attached to the periphery of the opening of the container body (2). The lower part of the outer wall (13) protrudes toward the inside of the container body (2). The outer chamber (25) is formed inside the bulging outer wall (13).

The inner wall (14) faces the outer wall (13). The inner wall (14) has a shape along the outer wall (13). A heat insulating material (16) is provided between the inner wall (14) and the outer wall (13).

The partition plate (15) is arranged inside the container body (2) rather than the inner wall (14). An internal flow path (20) is formed between the partition wall (12) and the partition plate (15). An inlet (21) is formed between the upper end of the partition plate (15) and the top plate of the container body (2). An outflow port (22) is formed between the lower end of the partition plate (15) and the lower end of the partition wall (12). The internal flow path (20) is formed from the inlet (21) to the outlet (22).

(3-2) Components of Refrigerant Circuit The refrigerant circuit (30) has a refrigerant filled therein. The refrigerant circuit (30) performs a vapor compression refrigeration cycle by circulating refrigerant. The refrigerant circuit (30) includes a compressor (31), an outside heat exchanger (32), an expansion valve (33), an inside heat exchanger (51), and refrigerant piping connecting these.

The compressor (31) is arranged in the lower part of the outer chamber (25). The outside heat exchanger (32) is arranged above the outside chamber (25). The outside heat exchanger (32) is a fin-and-tube heat exchanger that exchanges heat between refrigerant and outside air. The shape of the outside heat exchanger (32) is generally rectangular tubular. The internal heat exchanger (51) is arranged in the internal flow path (20). The indoor heat exchanger (51) is a fin-and-tube heat exchanger that exchanges heat between the refrigerant and the indoor air.

(3-3) Outside Fan and Inside Fan The transportation refrigeration equipment (10) has one outside fan (34). The outside fan (34) is a propeller fan. The outdoor fan (34) is arranged in the outdoor chamber (25). The external fan (34) is arranged inside the cylindrical external heat exchanger (32). The outside fan (34) sends outside air to the outside heat exchanger (32).

The transportation refrigeration equipment (10) is equipped with two internal fans (35). The internal fan (35) is a propeller fan. The internal fan (35) is arranged in the internal flow path (20). The internal fan (35) is arranged above the internal heat exchanger (51). The internal fan (35) sends internal air to the internal heat exchanger (51).

(3-4) Heater The transportation refrigeration system (10) has a heater (52). The heater (52) is arranged below the internal heat exchanger (51). The heater (52) is used to melt frost adhering to the internal heat exchanger (51).

(3-5) Electrical Component Box As shown in FIG. 1, the transport refrigeration system (10) has an electrical component box (36). The electrical component box (36) is arranged above the outer chamber (25). Electrical components such as an inverter board and a control board are housed inside the electrical component box (36).

(3-6) Configuration of Refrigerant Circuit As shown in FIG. 3, the refrigerant circuit (30) includes, as main components, a compressor (31), an external heat exchanger (32), and an expansion valve (33). , and an internal heat exchanger (51). The expansion valve (33) is an electronic expansion valve whose degree of opening is adjustable.

The refrigerant circuit (30) has a discharge pipe (41) and a suction pipe (42). One end of the discharge pipe (41) is connected to the discharge portion of the compressor (31). The other end of the discharge pipe (41) is connected to the gas end of the outside heat exchanger (32). One end of the suction pipe (42) is connected to the suction portion of the compressor (31). The other end of the suction pipe (42) is connected to the gas end of the internal heat exchanger (51).

The refrigerant circuit (30) includes a liquid pipe (43), a receiver (44), a cooling heat exchanger (45), a first on-off valve (46), a communication pipe (47), a second on-off valve (48), and an injection pipe. (49), and an injection valve (50).

One end of the liquid pipe (43) is connected to the liquid end of the outside heat exchanger (32). The other end of the liquid pipe (43) is connected to the liquid end of the internal heat exchanger (51). A receiver (44) is provided in the liquid pipe (43). The receiver (44) is a container that stores refrigerant.

The cooling heat exchanger (45) has a first flow path (45a) and a second flow path (45b). The cooling heat exchanger (45) exchanges heat between the refrigerant in the first flow path (45a) and the refrigerant in the second flow path (45b). The cooling heat exchanger (45) is, for example, a plate heat exchanger. The first flow path (45a) is part of the liquid pipe (43). The second flow path (45b) is part of the injection pipe (49). The cooling heat exchanger (45) cools the refrigerant flowing through the liquid pipe (43).

The first on-off valve (46) is provided in a portion of the liquid pipe (43) between the receiver (44) and the first flow path (45a). The first on-off valve (46) is an openable/closable electromagnetic valve.

The communication pipe (47) communicates the high pressure line and the low pressure line of the refrigerant circuit (30). One end of the communication pipe (47) is connected to the discharge pipe (41). The other end of the communication pipe (47) is connected to a portion of the liquid pipe (43) between the expansion valve (33) and the internal heat exchanger (51).

The second on-off valve (48) is provided on the communicating pipe (47). The second on-off valve (48) is an electromagnetic valve that can be opened and closed.

The injection pipe (49) introduces refrigerant into the intermediate pressure section of the compressor (31). One end of the injection pipe (49) is connected to a portion of the liquid pipe (43) between the receiver (44) and the first flow path (45a). The other end of the injection pipe (49) is connected to the intermediate pressure section of the compressor (31). The intermediate pressure, which is the pressure of the intermediate pressure section, is higher than the suction pressure of the compressor (31) and lower than its discharge pressure.

The injection valve (50) is provided in a portion of the injection pipe (49) on the upstream side of the second flow path (45b). The injection valve (50) is an electronic expansion valve whose degree of opening is adjustable.

(3-7) First Control Unit As shown in FIG. 4, the transportation refrigeration system (10) comprises a first control unit (90). The first control unit (90) includes a display section (91), an operation section (92), and a first control section (93).

The display section (91) is composed of, for example, a liquid crystal panel. The display section (91) displays information regarding the operation of the transportation refrigeration system (10) and the air conditioner (100).

The operation unit (92) is composed of operation buttons. The operation section (92) may be a touch panel that doubles as a liquid crystal panel as the display section (91). A person operates the transportation refrigeration system (10) using the operation unit (92). A person sets the operating conditions of the transport refrigeration system (10) using the operation unit (92).

The first control unit (93) includes an MCU (Micro Control Unit, microcontroller unit), electric circuits, and electronic circuits. The MCU includes a CPU (Central Processing Unit), memory, and a communication interface. Various programs for the CPU to execute are stored in the memory.

The first control section (93) controls the outside fan (34), the inside fan (35), the heater (52), and the refrigerant circuit (30). Specifically, the first control section (93) controls the outside fan (34), the inside fan (35), the heater (52), and the compressor (31). The first control section (93) controls the rotation speed of the outside fan (34), the rotation speed of the inside fan (35), and the rotation speed (operating frequency) of the compressor (31). The first control section (93) controls opening degrees of the expansion valve (33), the first on-off valve (46), the second on-off valve (48), and the injection valve (50).

(3-8) Operating Behavior of Refrigeration Equipment for Transportation The basic operation behavior of the refrigeration equipment for transportation (10) will be described. During operation of the transportation refrigeration apparatus (10), the first control section (93) operates the compressor (31), the outside fan (34), and the inside fan (35). The first control section (93) opens the first on-off valve (46) and closes the second on-off valve (48). The first control section (93) adjusts the degree of opening of the expansion valve (33). A first control section (93) adjusts the opening of the injection valve (50).

The refrigerant compressed by the compressor (31) flows through the outside heat exchanger (32). In the outside heat exchanger (32), the refrigerant radiates heat to the outside air and condenses. The condensed refrigerant passes through the receiver (44). Part of the refrigerant that has passed through the receiver (44) flows through the first flow path (45a) of the cooling heat exchanger (45). The remainder of the refrigerant that has passed through the receiver (44) flows through the injection pipe (49) and is reduced to intermediate pressure at the injection valve (50). The depressurized refrigerant is introduced into the intermediate pressure section of the compressor (31).

In the cooling heat exchanger (45), the refrigerant in the second flow path (45b) absorbs heat from the refrigerant in the first flow path (45a) and evaporates. This cools the coolant in the first flow path (45a). In other words, the degree of supercooling of the refrigerant flowing through the first flow path (45a) increases.

The refrigerant cooled by the cooling heat exchanger (45) is decompressed to a low pressure by the expansion valve (33). The depressurized refrigerant flows through the internal heat exchanger (51). In the indoor heat exchanger (51), the refrigerant absorbs heat from the indoor air and evaporates. As a result, the indoor heat exchanger (51) cools the indoor air. The evaporated refrigerant is sucked into the compressor (31) and compressed again.

The air inside the container body (2) circulates through the storage space (5) and the inside channel (20). In the in-chamber flow path (20), the in-chamber air is cooled by the in-chamber heat exchanger (51). Thereby, the inside air of the storage space (5) can be cooled, and the inside air can be adjusted to a predetermined temperature.

(4) Air conditioner The transport refrigeration system (10) of the present embodiment includes an air conditioner (100).

The air conditioner (100) is provided in the transportation refrigeration equipment (10) for so-called CA (Controlled Atmosphere) transportation. The air conditioner (100) regulates the composition of the air in the storage space (5) of the shipping container (1) to be different from the composition of the atmosphere.

As shown in FIG. 5, the air conditioner (100) has an air flow path (A) into which air to be treated is introduced. The air to be treated includes outside air and inside air. The air flow path (A) may be composed of a hard pipe, a flexible hose, or a combination of a pipe and a hose.

An air pump (110), a gas separation module (120), and a sensor unit (140) are provided in the air flow path (A). The air pump (110) conveys air in the air flow path (A). A gas separation module (120) regulates the composition of the air. A gas separation module (120) separates the air to be treated into primary air and secondary air. A sensor unit (140) measures the composition of the air.

(4-1) Air flow path The air flow path (A) includes an inflow flow path (101), an air supply flow path (102), an exhaust flow path (103), an internal exhaust flow path (104), a bypass flow path (105 ), and a sensor channel (106).

The inflow channel (101) is a channel for sending the air to be treated to the gas separation module (120). The inflow channel (101) includes a first inflow channel (101a), a second inflow channel (101b), and an inflow main channel (101c).

The first inflow path (101a) is a flow path for introducing outside air into the air flow path (A). The inlet end of the first inflow path (101a) opens to the outside space (6). A first air filter (F1) is provided in the first inflow path (101a). The first air filter (F1) captures dust, salt, and the like contained in outside air. The first air filter (F1) is composed of, for example, a membrane filter.

The second inflow path (101b) is a flow path for introducing internal air into the air flow path (A). The inlet end of the second inflow path (101b) opens into the storage space (5). A second air filter (F2) is provided in the second inflow path (101b). The second air filter (F2) captures dust and the like contained in the air inside the refrigerator. The second air filter (F2) is composed of, for example, a membrane filter. A first water separator (111) is provided in the second inflow passage (101b).

The outlet end of the first inflow channel (101a) and the outlet end of the second inflow channel (101b) are connected to the inlet end of the inflow trunk (101c). The outlet end of the inlet conduit (101c) is connected to the first inlet port (I1) of the gas separation module (120). The inflow trunk (101c) is provided with an air pump (110), a condensation circuit (112), a second water separator (113), and a water separation module (130) from the upstream side to the downstream side of the air flow. be done.

The air supply channel (102) is a channel for sending the air separated by the gas separation module (120) to the storage space (5). The air supply channel (102) includes a first air supply channel (102a), a second air supply channel (102b), and an air supply trunk (102c).

The first air supply path (102a) is a flow path for sending the first air separated by the gas separation module (120) to the storage space (5). The inlet end of the first air supply line (102a) is connected to the first outlet port (O1) of the gas separation module (120).

The second air supply path (102b) is a flow path for sending the second air separated by the gas separation module (120) to the storage space (5). The inlet end of the second air supply line (102b) is connected to the second outlet port (O2) of the gas separation module (120).

The outlet end of the first air supply passage (102a) and the outlet end of the second air supply passage (102b) are connected to the inlet end of the air supply trunk (102c). The outlet end of the air supply trunk (102c) opens into the storage space (5). Strictly speaking, the outlet end of the air supply trunk (102c) opens into the flow path downstream of the internal fan (35) in the internal flow path (20) of the transportation refrigeration equipment (10).

The exhaust channel (103) is a channel for discharging the air separated by the gas separation module (120) to the outside space (6). This air includes one or both of primary air and secondary air. The exhaust passageway (103) includes a first exhaust passageway (103a), a second exhaust passageway (103b), and an exhaust trunk passageway (103c).

The first exhaust path (103a) is a flow path for discharging the first air to the outside space (6). The inlet end of the first exhaust channel (103a) is connected to the first air supply channel (102a). The second exhaust path (103b) is a flow path for discharging the second air to the outside space (6). The inlet end of the second exhaust path (103b) connects to the second air supply path (102b). The outlet end of the first exhaust passage (103a) and the outlet end of the second exhaust passage (103b) are connected to the inlet end of the exhaust trunk (103c). The exit end of the exhaust trunk (103c) opens to the outside space (6).

The inside exhaust path (104) is a flow path for discharging the air in the storage space (5) to the outside space (6). The inlet end of the inside exhaust channel (104) is connected to the middle part of the second inflow channel (101b). Strictly speaking, the inlet end of the inside exhaust passage (104) is connected to the first switching valve (151). The exit end of the inside exhaust passage (104) opens to the outside space (6).

The bypass channel (105) is connected to the inlet trunk (101c) so that the air bypasses the gas separation module (120). The inlet end of the bypass channel (105) connects to the inflow trunk (101c). Strictly speaking, the inlet end of the bypass flow path (105) is connected to the second switching valve (152). The outlet end of the bypass channel (105) is connected to the first air supply channel (102a).

The sensor channel (106) is a channel for sending air to the sensor unit (140). The sensor channel (106) includes a first sensor channel (106a) and a second sensor channel (106b). The inlet end of the first sensor channel (106a) connects to the first air supply channel (102a). The outlet end of the first sensor path (106a) connects to the sensor unit (140). The inlet end of the second sensor path (106b) connects to the sensor unit (140). The exit end of the second sensor channel (106b) opens into the storage space (5). Strictly speaking, the outlet end of the second sensor path (106b) opens into the flow path upstream of the internal fan (35) in the internal flow path (20) of the transportation refrigeration apparatus (10).

(4-2) Air Pump The air pump (110) is an example of an air conveying section. The air pump (110) has a suction port and a discharge port. The air pump (110) pressurizes the air sucked through the suction port and discharges the pressurized air through the discharge port. The air pump (110) is an example of a pressurizing section that pressurizes the air supplied to the gas separation membrane (124).

(4-3-1) Configuration of Gas Separation Module The gas separation module (120) separates the air to be treated into first air and second air having different compositions. As shown in FIG. 6, the gas separation module (120) includes a first case (121), a first partition (122), a second partition (123), and a plurality of gas separation membranes (124). have The first partition (122) and the second partition (123) are arranged inside the first case (121). A plurality of gas separation membranes (124) are disposed between the first partition (122) and the second partition (123).

The first case (121) is a cylindrical container with both ends closed. The first case (121) extends in its axial direction. A first inlet port (I1) is connected to one axial end of the first case (121). A first outlet port (O1) is connected to the other axial end of the first case (121). A second outlet port (O2) is connected to the peripheral wall of the first case (121).

The first partition (122) is arranged near one end of the first case (121). The second partition (123) is arranged near the other end of the first case (121). The first partition (122) and the second partition (123) are partition members for partitioning the inner space of the first case (121) in the axial direction. The first partition (122) and the second partition (123) are provided across the first case (121).

A first lead-in chamber (125), a first lead-out chamber (126), and a second lead-out chamber (127) are formed inside the first case (121). The first introduction chamber (125) is formed between one end of the first case (121) and the first partition (122). The first lead-out chamber (126) is formed between the other end of the first case (121) and the second partition (123). The second lead-out chamber (127) includes a plurality of gas separation membranes ( 124).

The gas separation membrane (124) is composed of a resin hollow fiber membrane. In other words, the gas separation membrane (124) is shaped like a hollow fiber or an elongated tube. The outer diameter of one gas separation membrane (124) is 1 mm or less. The gas separation membranes (124) have substantially the same thickness.

Each gas separation membrane (124) extends in the axial direction of the first case (121) across the first partition (122) and the second partition (123). One end (inlet end) of the gas separation membrane (124) penetrates the first partition (122) and opens into the first introduction chamber (125). The other end (outlet end) of the gas separation membrane (124) penetrates the second partition (123) and opens into the first outlet chamber (126). The first introduction chamber (125) and the first discharge chamber (126) communicate with each other through the gas separation membrane (124). The second outlet chamber (127) does not substantially communicate with the interiors of the first inlet chamber (125), the first outlet chamber (126), and the gas separation membrane (124).

The gas separation membrane (124) is a polymeric non-porous membrane. The gas separation membrane (124) separates the components contained in the mixed gas by utilizing the fact that the speed of molecules permeating through the gas separation membrane (124) differs for each substance.

The gas separation membrane (124) has a characteristic that the nitrogen permeation rate is lower than both the oxygen permeation rate and the carbon dioxide permeation rate. In other words, the gas separation membrane (124) has a characteristic that the nitrogen permeability is lower than both the oxygen permeability and the carbon dioxide permeability.

(4-3-2) Operation of Gas Separation Module The air to be treated in the inflow channel (101) flows into the first introduction chamber (125) through the first inlet port (I1). The air in the first introduction chamber (125) flows through each gas separation membrane (124) toward the first discharge chamber (126). Part of the air inside the gas separation membrane (124) permeates the gas separation membrane (124) and moves to the second lead-out chamber (127), and the remainder flows out to the first lead-out chamber (126). .

The gas separation membrane (124) has a nitrogen permeability lower than that of oxygen and carbon dioxide. In other words, nitrogen in the air is less permeable through the gas separation membrane (124) than oxygen and carbon dioxide. Therefore, as the air flowing inside the gas separation membrane (124) approaches the first outlet chamber (126), its nitrogen concentration increases, and simultaneously its oxygen concentration and carbon dioxide concentration decrease. Oxygen and carbon dioxide contained in the air flowing through the gas separation membrane (124) pass through the gas separation membrane (124) and move to the second outlet chamber (127).

The concentration of nitrogen in the air flowing out to the first lead-out chamber (126) is higher than the concentration of nitrogen in the air in the first introduction chamber (125). The concentrations of oxygen and carbon dioxide in the air that flowed out to the first lead-out chamber (126) are lower than the concentrations of oxygen and carbon dioxide in the air in the first introduction chamber (125). The air in the first outlet chamber (126) is primary air. The first air flows out to the first air supply passage (102a) through the first outlet port (O1).

The nitrogen concentration in the air flowing out to the second lead-out chamber (127) is lower than the nitrogen concentration in the air in the first introduction chamber (125). The concentrations of oxygen and carbon dioxide in the air that flowed out to the second lead-out chamber (127) are higher than the concentrations of oxygen and carbon dioxide in the air in the first lead-in chamber (125). The air in the second outlet chamber (127) is secondary air. The second air flows out to the second air supply passage (102b) through the second outlet port (O2).

(4-4) First Water Separator, Condensing Circuit, and Second Water Separator The first water separator (111) is located downstream of the second air filter (F2) in the second inflow passage (101b). be provided. The first water separator (111) removes liquid water contained in the air. Strictly speaking, the first water separator (111) is a cyclone gas-liquid separator that removes liquid water contained in the air by centrifugal force. The first water separator (111) is an example of a dehumidification section that reduces moisture in the air supplied to the gas separation membrane (124).

The condensation circuit (112) is arranged in the inflow trunk (101c) between the air pump (110) and the second water separator (113). The condensation circuit (112) is composed of heat transfer tubes arranged in the internal space (5). When the air flows through the condensation circuit (112), the air is cooled by the inside air. As a result, moisture in the air in the condensation circuit (112) is condensed to produce condensed water.

The second water separator (113) is arranged between the condensation circuit (112) and the water separation module (130) in the inflow trunk (101c). The second water separator (113) removes moisture contained in the air. Strictly speaking, the second water separator (113) is a cyclone gas-liquid separator that removes liquid water contained in the air by centrifugal force. The second water separator (113) is an example of a dehumidification section that reduces moisture in the air supplied to the gas separation membrane (124).

(4-5-1) Configuration of Water Separation Module The water separation module (130) is arranged upstream of the gas separation membrane (124) in the inflow trunk (101c). The water separation module (130) removes water contained in the air. Strictly speaking, the water separation module (130) separates water molecules contained in the air. The water separation module (130) of this example is a membrane dryer made of Sunsep (registered trademark).

As shown in FIG. 7, the water separation module (130) includes a second case (131), a third partition (132), a fourth partition (133), and a plurality of water separation membranes (134). have The third partition (132) and the fourth partition (133) are arranged inside the second case (131). A plurality of water separation membranes (134) are arranged between the third partition (132) and the fourth partition (133).

The second case (131) is a cylindrical container with both ends closed. The second case (131) extends in its axial direction. A second inlet port (I2) is connected to one axial end of the second case (131). A third outlet port (O3) is connected to the other axial end of the second case (131). A third inlet port (I3) and a fourth outlet port (O4) are connected to the peripheral wall of the second case (131). The third inlet port (I3) is located near the other end of the second case (131) in the peripheral wall of the second case (131). The fourth outlet port (O4) is located near one end of the second case (131) in the peripheral wall of the second case (131).

As shown in FIG. 5, the second inlet port (I2) is connected to the upstream channel of the water separation module (130) in the inflow trunk (101c). The third outlet port (O3) is connected to the upstream channel of the gas separation module (120) in the inflow trunk (101c).

The air channel (A) has an introduction channel (107) and a water supply channel (108). The inlet (107) and water supply (108) connect to the water separation module (130).

The introduction channel (107) is a channel for supplying relatively low-humidity air to the water separation module (130). The inlet end of the introduction path (107) connects to the air supply trunk (102c). The outlet end of the inlet channel (107) connects to the third inlet port (I3) of the water separation module (130).

The water supply channel (108) is a channel for sending air containing water separated by the water separation module (130) to the storage space (5). The inlet end of the water supply channel (108) connects to the fourth outlet port (O4) of the water separation module (130). The outlet end of the water supply channel (108) is connected downstream of the inlet end of the introduction channel (107) in the air supply trunk (102c). Strictly speaking, the outlet end of the water supply path (108) is connected downstream of the fifth switching valve (155).

A second introduction chamber (135), a third discharge chamber (136), and a fourth discharge chamber (137) are formed inside the second case (131). The second introduction chamber (135) is formed between one end of the second case (131) and the third partition (132). The third lead-out chamber (136) is formed between the other end of the second case (131) and the fourth partition (133). The fourth lead-out chamber (137) includes a plurality of water separation membranes ( 134).

Each water separation membrane (134) extends in the axial direction of the second case (131) across the third partition (132) and the fourth partition (133). One end (inlet end) of the water separation membrane (134) penetrates the third partition (132) and opens into the second introduction chamber (135). The other end (outlet end) of the water separation membrane (134) penetrates the fourth partition (133) and opens into the third lead-out chamber (136). The second inlet chamber (135) and the third outlet chamber (136) communicate with each other via the water separation membrane (134). The fourth outlet chamber (137) does not substantially communicate with the second inlet chamber (135), the third outlet chamber (136), and the interior of the water separation membrane (134).

The water separation membrane (134) is composed of a resin hollow fiber membrane. In other words, the water separation membrane (134) is shaped like a hollow fiber or an elongated tube. The water separation membrane (134) is made of a fluorinated ion exchange resin. The water separation membrane (134) has a property of permeating water molecules in the air.

A water separation module (130) having a water separation membrane (134) is an example of a dehumidifying section that reduces moisture in the air supplied to the gas separation membrane (124).

(4-5-2) Operation of Water Separation Module The air to be treated in the inflow channel (101) flows into the second introduction chamber (135) through the second inlet port (I2). The air in the second introduction chamber (135) flows through each water separation membrane (134) toward the third discharge chamber (136). Air in the air supply trunk (102c) flows into the fourth outlet chamber (137) from the third inlet port (I3).

Water molecules in the air inside the water separation membrane (134) permeate the water separation membrane (134) and move to the fourth outlet chamber (137). As a result, the water molecules that permeate the water separation membrane (134) are added to the air flowing through the fourth outlet chamber (137). The air inside the water separation membrane (134) is dehumidified by losing water molecules and flows out to the third outlet chamber (136). Air in the third outlet chamber (136) exits through the third outlet port (O3) into the inlet conduit (101c) and is supplied to the gas separation module (120).

The air humidified in the fourth outlet chamber (137) flows out to the water supply path (108) through the fourth outlet port (O4). The air in the water supply channel (108) flows out to the air supply trunk channel (102c) and is sent to the storage space (5).

(4-6) Sensor Unit The sensor unit (140) includes an oxygen sensor (141), a carbon dioxide sensor (142), and a sensor case (143).

The oxygen sensor (141) is a zirconia current type sensor that measures the oxygen concentration of mixed gases such as air. The carbon dioxide sensor (142) is a non-dispersive infrared (NDIR) type sensor that measures the concentration of carbon dioxide in a mixed gas such as air. The oxygen sensor (141) and the carbon dioxide sensor (142) are housed in the sensor case (143).

The sensor case (143) is a box-shaped member. The sensor case (143) has a third air filter (F3). The third air filter (F3) is a membrane filter for capturing dust and the like contained in the inside air. The third air filter (F3) filters the indoor air flowing into the sensor case (143).

(4-7) Channel Switching Mechanism The air channel (A) is provided with a channel switching mechanism for changing the air flow. The channel switching mechanism includes a first switching valve (151), a second switching valve (152), a third switching valve (153), a fourth switching valve (154) and a fifth switching valve (155). These switching valves (151, 152, 153, 154, 155) are composed of three-way valves.

The first switching valve (151) is provided at the connecting portion between the second inflow passage (101b) and the inside exhaust passage (104). The first switching valve (151) switches between a first state in which the internal air is supplied to the gas separation module (120) and a second state in which the internal air is discharged to the external space (6). Specifically, the first switching valve (151) in the first state allows communication between the storage space (5) and the inflow trunk (101c) and isolates the storage space (5) from the outside space (6). do. The second switching valve (152) in the second state cuts off the storage space (5) and the inflow trunk (101c) and allows communication between the storage space (5) and the outside space (6).

The second switching valve (152) is provided at the connecting portion between the inflow trunk (101c) and the bypass channel (105). In other words, the second switching valve (152) is provided upstream of the gas separation membrane (124) in the inflow trunk (101c). The second switching valve (152) has a first state in which the air in the inflow channel (101) is supplied to the gas separation module (120) and a state in which the air in the inflow channel (101) bypasses the gas separation module (120). and the second state to Specifically, the second switching valve (152) in the first state allows communication between the inflow trunk (101c) and the gas separation membrane (124), and the inflow trunk (101c) and the bypass channel (105). block the The second switching valve (152) in the second state shuts off the inflow trunk (101c) and the gas separation membrane (124) and allows communication between the inflow trunk (101c) and the bypass channel (105).

The third switching valve (153) is provided at the connecting portion between the first air supply path (102a) and the first exhaust path (103a). In other words, the third switching valve (153) is provided in the first air supply path (102a) between the connecting portion of the sensor flow path (106) and the outlet end of the first air supply path (102a). The third switching valve (153) has a first state in which the air in the first air supply passage (102a) is supplied to the storage space (5), and a state in which the air in the first air supply passage (102a) is supplied to the outside space (6). ). Specifically, the third switching valve (153) in the first state communicates the first air supply path (102a) with the storage space (5), and the first air supply path (102a) communicates with the first exhaust path. (103a) and cut off. The third switching valve (153) in the second state isolates the first air supply path (102a) from the storage space (5) and disconnects the first air supply path (102a) from the first exhaust path (103a). communicate.

The fourth switching valve (154) is provided at the connecting portion between the second air supply path (102b) and the second exhaust path (103b). In other words, the fourth switching valve (154) is positioned in the second air supply line (102b) between the second outlet port (O2) of the gas separation module (120) and the outlet end of the second air supply line (102b). provided in between. The fourth switching valve (154) has a first state in which the air in the second air supply passage (102b) is supplied to the storage space (5), and a state in which the air in the second air supply passage (102b) is supplied to the outside space (6). ). Specifically, the fourth switching valve (154) in the first state communicates the second air supply path (102b) with the storage space (5), and the second air supply path (102b) communicates with the second exhaust path (102b). (103b) and cut off. The fourth switching valve (154) in the second state isolates the second air supply path (102b) from the storage space (5) and disconnects the second air supply path (102b) from the second exhaust path (103b). communicate.

The fifth switching valve (155) is provided at the connecting portion between the air supply trunk (102c) and the introduction passage (107). In other words, the fifth switching valve (155) is provided upstream of the water supply path (108) in the air supply trunk (102c). The fifth switching valve (155) is in a first state in which the air in the air supply channel (102) is supplied to the storage space (5) without passing through the water separation module (130), of air is supplied to the storage space (5) via the water separation module (130). Specifically, the fifth switching valve (155) in the first state allows the air supply trunk (102c) and the introduction passage (107) to communicate, and the air supply trunk (102c) and the storage space (5) to communicate with each other. block the The fifth switching valve (155) in the second state cuts off the air supply trunk (102c) and the introduction passage (107) and allows the air supply trunk (102c) to communicate with the storage space (5).

The channel switching mechanism includes an air on-off valve (156) provided in the air channel (A). An air on/off valve (156) is provided in the first sensor path (106a). The air on/off valve (156) is composed of, for example, an electromagnetic valve, and opens and closes the sensor channel (106).

(4-8) Check Valves The air flow path (A) is provided with a first check valve (157) and a second check valve (158).

The first check valve (157) is provided in the first air supply path (102a). Specifically, the first check valve (157) connects the first outlet port (O1) of the gas separation module (120) and the bypass channel (105) in the first air supply path (102a). provided between The first check valve (157) allows air flow from the first outlet port (O1) of the gas separation module (120) to the outlet end of the first air supply line (102a) and vice versa. Prohibit air flow.

The second check valve (158) is provided in the second air supply path (102b). Specifically, the second check valve (158) connects the second outlet port (O2) of the gas separation module (120) and the second exhaust line (103b) in the second air supply line (102b). provided between The second check valve (158) allows air flow from the second outlet port (O2) of the gas separation module (120) to the outlet end of the second air supply line (102b) and vice versa. Prohibit air flow.

(4-9) Pressure Sensor A first pressure sensor (161), a second pressure sensor (162), and a third pressure sensor (163) are provided in the air flow path (A). These pressure sensors (161, 162, 163) detect air pressure.

The first pressure sensor (161) is provided downstream of the water separation module (130) in the inflow channel (101). Specifically, the first pressure sensor (161) is provided between the first outlet port (O1) of the water separation module (130) and the second switching valve (152) in the inflow trunk (101c). . A first pressure sensor (161) detects the pressure inside the water separation module (130). Specifically, the first pressure sensor (161) detects the internal pressure of the third lead-out chamber (136) or the water separation membrane (134).

The second pressure sensor (162) is provided downstream of the gas separation module (120) in the first air supply path (102a). Specifically, the second pressure sensor (162) is positioned between the first outlet port (O1) of the gas separation module (120) and the third switching valve (153) in the first air supply line (102a). be provided. A second pressure sensor (162) detects the pressure inside the gas separation module (120). Specifically, the second pressure sensor (162) detects the pressure in the first outlet chamber (126) or the internal pressure of the gas separation membrane (124).

The third pressure sensor (163) is provided downstream of the gas separation module (120) in the second air supply path (102b). Specifically, the third pressure sensor (163) is positioned between the second outlet port (O2) of the gas separation module (120) and the fourth switching valve (154) in the second air supply line (102b). be provided. A third pressure sensor (163) detects the pressure in the second outlet chamber (127) of the gas separation module (120).

(4-10) Pressure Control Valve The air flow path (A) is provided with a first pressure control valve (171) and a second pressure control valve (172). These pressure control valves (171, 172) are an example of a pressure control section that controls air pressure.

The first pressure control valve (171) is provided downstream of the water separation module (130) in the inflow channel (101). Specifically, the first pressure control valve (171) is provided between the first pressure sensor (161) and the second switching valve (152) in the inflow trunk (101c). The first pressure control valve (171) regulates the pressure inside the water separation module (130). Specifically, the first pressure control valve (171) regulates the pressure in the third outlet chamber (136) of the water separation module (130) or the internal pressure of the water separation membrane (134). For example, the opening of the first pressure control valve (171) may be adjusted based on the pressure detected by the first pressure sensor (161). By adjusting the pressure inside the water separation module (130) with the first pressure control valve (171), the water separation module (130) can be dehumidified appropriately.

The second pressure control valve (172) is provided downstream of the gas separation module (120) in the first air supply path (102a). Specifically, the second pressure control valve (172) is provided between the second pressure sensor (162) and the third switching valve (153) in the first air supply passage (102a). A second pressure control valve (172) regulates the pressure inside the gas separation module (120). Specifically, the second pressure control valve (172) regulates the pressure in the first outlet chamber (125) of the gas separation module (120) or the internal pressure of the gas separation membrane (124). For example, the opening of the second pressure control valve (172) may be adjusted based on the pressure detected by the second pressure sensor (162). The second pressure regulating valve (172) regulates the internal pressure of the gas separation module (120) so that separation in the gas separation module (120) can be properly performed.

(4-11) Second Control Unit As shown in FIGS. 4 and 5, the air conditioner (100) includes a second control unit (190). The second control unit (190) is connected to the first control unit (90) via a communication line (W). The communication line (W) exchanges signals and information between the first control unit (90) and the second control unit (190). The communication line (W) is wired, but may be wireless.

The second control unit (190) includes a second control section (191). The second control section (191) is an example of the control section of the present disclosure.

The second control unit (191) includes an MCU (Micro Control Unit), electric circuits, and electronic circuits. The MCU includes a CPU (Central Processing Unit), memory, and a communication interface. Various programs for the CPU to execute are stored in the memory.

The second control unit (191) receives signals detected by the first pressure sensor (161), the second pressure sensor (162), and the third pressure sensor (163). The second control section (191) controls the air pump (110), the channel switching mechanism, and the pressure control valves (171, 172). Specifically, the second control section (191) controls the operation of the air pump (110). A second control section (191) switches each switching valve (151, 152, 153, 154, 155) between a first state and a second state. The second control section (191) opens and closes the air on/off valve (156). The second control section (191) adjusts the opening degrees of the pressure control valves (171, 172).

(4-12) Operating Behavior of Air Conditioner The operating behavior of the air conditioner (100) will be described. The operation of the air conditioner (100) includes first to fifth operations described below. In this example, in the first to fifth operations, the second control section (191) sets the fifth switching valve (155) to the first state. Therefore, in these operations, the water separation module (130) operates to remove moisture from the air.

(4-12-1) First operation In the first operation, both the outside air and the inside air are treated air, the first air is supplied to the storage space (5), and the second air is the outside space. This is the operation to discharge to (6). This first operation is performed to lower the oxygen concentration of the air inside the storage space (5).

As shown in FIG. 8, in the first operation, the second control section (191) switches the first switching valve (151) to the first state, the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state. The valve (153) is set to the first state, the fourth switching valve (154) is set to the second state, the fifth switching valve (155) is set to the first state, and the air on/off valve (156) is set to the closed state. .

In the first operation, the indoor air flowing through the second inflow path (101b) flows through the first water separator (111). The first water separator (111) separates water (liquid) from the inside air. The air that has passed through the first water separator (111) and the outside air that flows through the first inflow path (101a) flow into the inflow path (101c) and are mixed together, and then pumped through an air pump (110) as air to be treated. ). The air pump (110) pressurizes and discharges the sucked air. The air discharged from the air pump (110) flows through the second water separator (113) after being cooled by the condensation circuit (112). The second water separator (113) separates water condensed from the air to be treated while the air to be treated passes through the condensing circuit (112).

The air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130). The air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120). In the gas separation module (120), the air to be treated is separated into primary air and secondary air.

The first air, which has a lower oxygen concentration than the air to be treated, flows through the first air supply path (102a) and the introduction path (107) in order, and flows through the third outlet chamber (136) of the water separation module (130). In the third outlet chamber (136), water molecules permeating the water separation membrane (134) are applied to the primary air. The primary air humidified by the water separation module (130) sequentially flows through the water supply channel (108) and the air supply main channel (102c), and is supplied to the internal space (5).

The second air, which has a higher oxygen concentration than the air to be treated, flows through the second air supply path (102b), the second exhaust path (103b), and the exhaust main path (103c) in order, and is discharged to the outside space (6). be done.

In the first operation, the flow rate of the outside air flowing into the first inflow passage (101a) through the first air filter (F1) is higher than the flow rate of the second air discharged to the outside space (6). . As a result, the air pressure in the storage space (5) is higher than the air pressure outside the shipping container (1) (ie atmospheric pressure). The storage space (5) is thereby kept at a positive pressure.

(4-12-2) Second operation In the second operation, the outside air is treated air, the first air is supplied to the inside space (5), and the second air is discharged to the outside space (6). It is driving to do. This second operation is performed to reduce the oxygen concentration of the air inside the storage space (5).

As shown in FIG. 9, in the second operation, the second control section (191) switches the first switching valve (151) to the second state, switches the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state. The valve (153) is set to the first state, the fourth switching valve (154) is set to the second state, the fifth switching valve (155) is set to the first state, and the air on/off valve (156) is set to the closed state. .

Outside air flowing through the first inflow path (101a) is pressurized by the air pump (110) and then passes through the condensation circuit (112) and the second water separator (113). The air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130). The air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120). In the gas separation module (120), the air to be treated is separated into primary air and secondary air. The first air, which has a lower oxygen concentration than the air to be treated, is humidified by the water separation module (130), then flows through the water supply channel (108) and the air supply trunk channel (102c) in order, and flows into the internal space (5). supplied to

In the second operation, the storage space (5) is kept at positive pressure. Therefore, the air in the internal space (5) flows through the second inflow passage (101b) and the internal exhaust passage (104) and is discharged to the external space (6). As a result, the air in the storage space (5) is gradually replaced with the first air.

(4-12-3) Third operation The third operation is an operation in which both the outside air and the inside air are treated as the air to be treated, the first air is discharged outside the refrigerator, and the second air is supplied to the inside of the refrigerator. is. This third operation is performed to raise the oxygen concentration of the air inside the storage space (5).

As shown in FIG. 10, in the third operation, the second control section (191) switches the first switching valve (151) to the first state, switches the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state. The valve (153) is set to the second state, the fourth switching valve (154) is set to the first state, the fifth switching valve (155) is set to the first state, and the air on/off valve (156) is set to the closed state. .

In the third operation, the air (to-be-treated air) mixed with the outside air flowing through the first inflow passage (101a) and the inside air flowing through the second inflow passage (101b) is pressurized by the air pump (110). After being filtered, it passes through a condensation circuit (112) and a second water separator (113). The air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130). The air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120). In the gas separation module (120), the air to be treated is separated into primary air and secondary air. The first air, which has a lower oxygen concentration than the air to be treated, flows through the first air supply passage (102a), the first exhaust passage (103a), and the exhaust passage (103c) in order, and is discharged to the outside space (6). be done.

The second air, which has a higher oxygen concentration than the air to be treated, flows through the second air supply path (102b) and the introduction path (107) in order, and flows through the third outlet chamber (136) of the water separation module (130). In the third outlet chamber (136), water molecules permeating the water separation membrane (134) are added to the secondary air. The secondary air humidified by the water separation module (130) flows through the water supply path (108) and the air supply trunk (102c) in order, and is supplied to the internal space (5).

In the third run, the storage space (5) is kept at positive pressure.

(4-12-4) Fourth Operation The fourth operation is an operation in which the air outside the refrigerator is treated as the air to be treated, the first air is discharged outside the refrigerator, and the second air is supplied into the refrigerator. This fourth operation is performed to raise the oxygen concentration of the air inside the storage space (5).

As shown in FIG. 11, in the fourth operation, the second control section (191) switches the first switching valve (151) to the second state, switches the second switching valve (152) to the first state, and switches the third switching valve (152) to the first state. The valve (153) is set to the second state, the fourth switching valve (154) is set to the first state, the fifth switching valve (155) is set to the first state, and the air on/off valve (156) is set to the closed state. .

Outside air (air to be treated) flowing through the first inflow passage (101a) is pressurized by the air pump (110) and then passes through the condensation circuit (112) and the second water separator (113). The air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130). The air to be treated that has been dehumidified in the water separation module (130) flows into the gas separation module (120). In the gas separation module (120), the air to be treated is separated into primary air and secondary air. The second air, which has a higher oxygen concentration than the air to be treated, is humidified by the water separation module (130), then flows through the water supply channel (108) and the air supply main channel (102c) in order, and flows into the internal space (5). supplied to

The first air, which has an oxygen concentration lower than that of the air to be treated, sequentially flows through the second air supply path (102b), the second exhaust path (103b), and the exhaust main path (103c), and is discharged to the outside space (6). be done.

In the fourth run, the storage space (5) is kept at positive pressure. Therefore, the air in the internal space (5) flows through the second inflow passage (101b) and the internal exhaust passage (104) and is discharged to the external space (6). As a result, the air in the storage space (5) is gradually replaced with the second air.

(4-12-5) Fifth Operation The fifth operation is an operation in which outside air is supplied to the inside of the refrigerator as it is. This fifth operation is performed to raise the oxygen concentration of the air inside the storage space (5).

As shown in FIG. 12, in the fifth operation, the second control section (191) switches the first switching valve (151) to the second state, switches the second switching valve (152) to the second state, and switches the third switching valve (152) to the second state. The valve (153) is set to the first state, the fourth switching valve (154) is set to the second state, the fifth switching valve (155) is set to the first state, and the air on/off valve (156) is set to the closed state. .

Outside air flowing through the first inflow path (101a) is pressurized by the air pump (110) and then passes through the condensation circuit (112) and the second water separator (113). The air that has passed through the second water separator (113) is dehumidified by flowing through the water separation membrane (134) of the water separation module (130). Air dehumidified in the water separation module (130) flows through the bypass channel (105) to bypass the gas separation module (120). The air flowing out of the bypass channel (105) sequentially flows through the first air supply channel (102a) and the introduction channel (107), and then flows through the third outlet chamber (136) of the water separation module (130). In the third outlet chamber (136), water molecules that permeate the water separation membrane (134) are added to the air. The air humidified by the water separation module (130) sequentially flows through the water supply path (108) and the air supply trunk (102c) and is supplied to the internal space (5).

In the fifth operation, the storage space (5) is kept at positive pressure. Therefore, the air in the internal space (5) flows through the second inflow passage (101b) and the internal exhaust passage (104) and is discharged to the external space (6). As a result, the air in the storage space (5) is gradually replaced with the outside air.

(5-1) Deterioration of Gas Separation Membrane Performance If the air conditioner (100) is stopped for a long period of time, the performance of the gas separation membrane (124) of the gas separation module (120) is degraded. Specifically, the gas separation membrane (124) has a large number of pores for separating gases. When the gas separation module (120) is not used for a long period of time as the air conditioner (100) deteriorates, the gas separation membrane (124) shrinks and the pore size becomes smaller. As a result, the permeability of the gas separation membrane (124) to oxygen and carbon dioxide is lowered, and the gas separation performance of the air conditioner (100) is lowered.

(5-2) Preliminary Operation Start Determination The air conditioner (100) of the present embodiment performs the first operation to solve the above problem. Specifically, the second control section (191) performs a first operation of suppressing deterioration of the performance of the gas separation membrane (124) due to the suspension of the air conditioner (100) for a predetermined period of time. The first operation of this embodiment includes a preliminary operation of supplying the air to be treated to the gas separation membrane (124). The second control section (191) starts the preliminary operation after a predetermined period of time has passed since the air conditioner (100) stopped.

The control related to the preliminary operation of this embodiment will be described in detail with reference to FIG.

In step ST1, when the second control section (191) receives an operation command for normal operation, in step ST2, the second control section (191) controls the air conditioner (100) to perform normal operation. . Here, the normal operation is an operation in which the air to be treated is separated by the gas separation module (120), and includes the first operation, second operation, third operation and fourth operation described above. Normal operation aims at adjusting the composition of the air in the containment space (5).

In step ST3, when the second control section (191) receives a command to stop normal operation, in step ST4, the second control section (191) stops the air conditioner (100).

In step ST5, when the predetermined time T1 has passed since the operation of the air conditioner (100) stopped, in step ST6, the second control section (191) causes the preliminary operation to be performed. The operation here includes normal operation and preliminary operation. The predetermined time T1 is set in consideration of the deterioration of the performance of the gas separation membrane (124) due to stoppage of the air conditioner (100) or non-use of the gas separation membrane (124). The predetermined time T1 is set, for example, from several days to several tens of days.

In step ST7, when the conditions for stopping the preliminary operation are satisfied, in step ST8, the second control unit (191) stops the preliminary operation. The condition for stopping the preliminary operation in this example is that a predetermined time T2 has passed since the preliminary operation started.

(5-3) Preliminary operation Preliminary operation is an operation to supply air to be treated to the gas separation membrane (124). The preliminary operation is an operation performed for the purpose of suppressing deterioration in the performance of the gas separation membrane (124) due to the suspension of the air conditioner (100) for a predetermined period. Therefore, the air conditioner (100) in preliminary operation may perform the same operations as in the first, second, third, and fourth operations described above. The preliminary operation of this embodiment differs from the above-described normal operation in that it is not executed by an operation command accompanying a human operation such as a user.

In the preliminary operation, for example, when the same operation as the first operation (see FIG. 8) is performed, the air to be treated flows through the gas separation module (120). In the gas separation module (120), the air to be treated that has flowed into the first introduction chamber (125) flows through each gas separation membrane (124). As the air to be treated flows through the interior of the gas separation membrane (124), the gas separation membrane (124) expands, increasing the size of each pore. This recovers the oxygen and carbon dioxide separation performance of the gas separation membrane (124).

The air pump (110) constitutes a pressurizing section that pressurizes the air supplied to the gas separation membrane (124). Specifically, the air pump (110) pressurizes the air to be treated so that the internal pressure of the gas separation membrane (124) in preliminary operation is equal to or higher than the internal pressure P1 of the gas separation membrane (124) in normal operation. . The air pump (110) pressurizes the air to be treated so that the internal pressure of the gas separation membrane (124) does not exceed its withstand pressure P2. The internal pressure of the gas separation membrane (124) can be adjusted by the second pressure control valve (172). Specifically, the second control section (191) controls the degree of opening of the second pressure control valve (172) so that the pressure detected by the second pressure sensor (162) is greater than or equal to P1 and less than P2. The internal pressure of the gas separation membrane (124) during preliminary operation is maintained at, for example, 700 [kPa].

As described above, by pressurizing the air to be treated that is supplied to the gas separation membrane (124), the gas separation membrane (124) is easily expanded, and the pore size is easily widened. As a result, the performance recovery effect of the gas separation membrane (124) is improved.

The air conditioner (100) has a first water separation membrane (134), a second water separation membrane (134), and a water separation module (130) as a dehumidifier. These dehumidifiers reduce the moisture in the air supplied to the gas separation membrane (124). Here, when moisture in the air supplied to the gas separation membrane (124) adheres to the gas separation membrane (124), this moisture clogs the pores, thereby degrading the separation performance of the gas separation membrane (124). Sometimes I end up On the other hand, the first water separation membrane (134), the second water separation membrane (134), and the water separation module (130) dehumidify the air as the dehumidifying section, so that the moisture is removed from the gas separation membrane (124). It is possible to suppress deterioration in the performance of the gas separation membrane (124) due to adhesion to the . The dehumidifying section may be one or two of the first water separator (111), the second water separator (113), and the water separation module (130), or other It may be a dehumidifying part of the system.

As described above, the second control section (191) continues the preliminary operation for the predetermined time T2. The predetermined time T2 is set to 24 hours, for example. Thus, by continuing the preliminary operation for the predetermined time T2, the pore size of the gas separation membrane (124) can be sufficiently widened.

(6) Features of the embodiment (6-1)
The air conditioner (100) of the above-described embodiment includes a second control unit ( 191). Therefore, even when the gas separation membrane (124) contracts and its performance deteriorates, the first operation can suppress the deterioration of the performance of the gas separation membrane (124).

(6-2)
A first operation includes a preliminary operation in which air to be treated is supplied to the gas separation membrane (124). In this preliminary operation, when the air to be treated is supplied to the gas separation membrane (124), the gas separation membrane (124) can be expanded and its pore size can be enlarged. As a result, the performance of the gas separation membrane (124) can be easily and quickly recovered.

(6-3)
The second control section (191) starts the preliminary operation when a predetermined time has elapsed since the air conditioner (100) stopped. Therefore, the performance of the gas separation membrane (124) can be reliably recovered at the timing when the performance of the gas separation membrane (124) is lowered due to the shutdown of the air conditioner (100).

(6-4)
The air conditioner (100) has an air pump (110) that pressurizes the air supplied to the gas separation membrane (124) in preliminary operation. This makes it easier to expand the gas separation membrane (124), so that the performance of the gas separation membrane (124) can be quickly and reliably recovered.

(6-5)
The air conditioner (100) includes a dehumidifying section (111, 113, 130) that reduces moisture in the air supplied to the gas separation membrane (124) in preliminary operation. This can prevent moisture from clogging the pores of the gas separation membrane (124), thereby suppressing deterioration of the performance of the gas separation membrane (124).

(7) Modifications of the Embodiments In the above-described embodiments, the following modifications may be made. In the following description, in principle, points different from the embodiment will be described.

(7-1) Modification 1
The second control section (191) of Modification 1 starts the preliminary operation a predetermined time before the start of the normal operation. This control will be described with reference to FIG.

At step ST11, the second control section (191) determines the start time of normal operation. The second control section (191) may estimate the start time of normal operation. In this case, the second control unit (191) estimates the start time of normal operation based on, for example, the transport route of the transport container (1). For example, by installing a GPS (Global Positioning System) in a shipping container (1) or a ship that transports the shipping container (1), the second control unit (191) can control the shipping container ( 1) You can get the transportation route. The second control unit (191) identifies, for example, the arrival of the shipping container (1) at the port based on GPS, and estimates the start time of normal operation in conjunction with this timing. When the shipping container (1) arrives at the port, the following perishables are transported to the container body (2), and it is necessary to cool the air in the storage space (5) and adjust the composition of this air. is.

It should be noted that the normal operation start time may be an input value determined in advance by the user. In this case, the user determines the normal operation start time using the operation unit (92). The second control section (191) determines the time input via the operation section (92) as the normal operation start time.

At step ST12, the second control section (191) determines the start time of the preliminary operation. The start time of the preliminary operation is the time obtained by subtracting the execution time of the preliminary operation (for example, T2 described above) from the start time of the normal operation.

At step ST13, the second control section (191) causes the air conditioning device (100) to perform preliminary operation from the start time obtained at step ST12. As a result, the air to be treated is supplied to the gas separation membrane (124), similar to the embodiments described above. Therefore, the performance of the gas separation membrane (124) can be recovered.

When the preliminary operation ends, the second control section (191) executes normal operation in step ST14. Specifically, in normal operation, for example, the above-described first, second, third, or fourth operation is performed. Preliminary operation is performed immediately before normal operation to restore the performance of the gas separation membrane (124). Therefore, in normal operation, gas separation performance of the gas separation membrane (124) can be fully exhibited.

Note that in Modification 1, preliminary operation and normal operation may be performed continuously. In this case, the preliminary operation preferably performs the same operation as the normal operation. Specifically, in normal operation, the second control section (191) causes the air conditioner (100) to perform the first operation. In this case, the second control section (191) causes the air conditioner (100) to perform the first operation even in the preliminary operation to restore the performance of the gas separation membrane (124). Strictly speaking, the second control section (191) continuously executes the first operation as the normal operation after the execution time of the first operation as the preliminary operation has elapsed. As a result, the performance of the gas separation membrane (124) can be sufficiently obtained from the start time of normal operation without stopping the air conditioner (100).

(7-2) Modification 2
As shown in FIG. 15, the air conditioner (100) according to Modification 2 includes a water separation module (130) according to the embodiment, an introduction passage (107), a water supply passage (108), and a fifth switching valve ( 155). The air conditioner (100) of Modification 2 performs the first operation, the second operation, the third operation, the fourth operation, and the fifth operation in the same manner as in the embodiment. The modification 2 differs from the embodiment in that the air in the air supply trunk (102c) is sent directly to the storage space (5) without passing through the introduction path (107) and the water supply path (108).

In the preliminary operation of the air conditioner (100) of Modification 2, as shown in FIG. 16, the first air and the second air separated by the gas separation module (120) are discharged to the outside space (6). . In other words, the exhaust channel (103) of Modification 2 discharges the first air and the second air separated by the gas separation membrane (124) to the outside space (6).

Specifically, in the preliminary operation, the second control section (191) sets the third switching valve (153) to the second state and the fourth switching valve (154) to the second state. The second control section (191) sets, for example, the second switching valve (152) to the first state and the air on/off valve (156) to the closed state. For example, the second control section (191) sets the first switching valve (151) to the first state. The second control section (191) may set the first switching valve (151) to the second state.

In preliminary operation, the air dehumidified in the first water separator (111) is supplied to the gas separation membrane (124) of the gas separation module (120). This restores the performance of the gas separation membrane (124). The first air separated by the gas separation module (120) sequentially flows through the first air supply line (102a) and the first exhaust line (103a), and then flows out to the exhaust trunk line (103c). The second air separated by the gas separation module (120) sequentially flows through the second air supply line (102b) and the second exhaust line (103b), and then flows out to the exhaust trunk line (103c). The air merged in the exhaust trunk (103c) is discharged to the outside space (6). In preliminary operation, when the second control section (191) sets the first switching valve (151) to the first state, the air dehumidified in the second water separator (113) is also dehumidified in the gas separation module (120). It is fed to the gas separation membrane (124). This restores the performance of the gas separation membrane (124).

As described above, in Modification 2, the first air and the second air separated by the gas separation membrane (124) are discharged to the outside space (6) in the preliminary operation. In other words, in the preliminary operation, the first air and the second air are not supplied to the storage space (5), which is the internal space. Therefore, it is possible to avoid a change in the composition of the air in the storage space (5) due to the execution of the preliminary operation.

In the air flow path (A) of Modification 2, the second inflow path (101b) is omitted, the storage space (5) is not connected to the inflow path (101), and the storage space (5) is connected to the inside exhaust path. It may be connected to the outside space (6) via (104). In this case, an on-off valve is provided in the inside exhaust passage (104). By setting the opening/closing state of the on-off valve by the second control section (191), it is possible to switch whether or not to discharge the inside air of the storage space (5) to the outside space (6). In the preliminary operation, when the second control section (191) closes the on-off valve, the air inside the refrigerator is not discharged to the outside space (6) through the interior exhaust passage (104). Therefore, it is possible to suppress a change in the composition of the air in the storage space (5), which is the internal space. In addition, it is possible to prevent the pressure in the storage space (5) from changing.

(7-3) Modification 3
As shown in FIG. 17, the air conditioner (100) of Modification 3 is provided with a heating section (175) in the air flow path (A). The heating section (175) heats the air supplied to the gas separation membrane (124) in preliminary operation. The heating part (175) of this example is configured by an electric heater. The heating section (175) is provided in the inflow trunk (101c). Specifically, the heating section (175) is provided between the water separation module (130) and the gas separation module (120).

In the preliminary operation of Modification 3, the air to be treated heated to a predetermined temperature by the heating unit (175) is supplied to the gas separation membrane (124). By heating the air to be treated, the components in the air can improve the recovery performance of the gas separation membrane (124). This is attributed to the increase in the diffusion coefficient of gas in the gas separation membrane (124) as the air temperature rises and the decrease in relative humidity in the air as the air temperature rises. I can guess.

Note that the heating unit (175) may be a device that is provided in the refrigeration system (10) and heats air by exhaust heat. This equipment includes, for example, a compressor (31).

(7-4) Modification 4
The second control section (191) of Modified Example 4 performs, as the first action, an action for prompting the user to operate the air conditioner (100). Control regarding this operation will be described in detail with reference to FIG.

In step ST21, the second control section (191) determines whether or not a first condition indicating that the performance of the gas separation membrane (124) is degraded is met. Here, the first condition is that a predetermined period of time has passed since the air conditioner (100) stopped and that the gas separation membrane (124) has not been used for a predetermined period of time or longer. This is because when these conditions are satisfied, the pore size of the gas separation membrane (124) becomes small.

When the first condition is established in step ST21, in step S22 the second control section (191) outputs a first signal for prompting the person to operate the air conditioner (100). The first signal output from the second control section (191) is input to the first control section (93) of the first control unit (90) via the communication line (W).

Upon receiving the first signal, the first control section (93) controls the display section (91) to prompt the user to operate the air conditioner (100). Strictly speaking, the first control section (93), which has received the first signal, controls the display section (91) so as to prompt the person to drive normally. The display section (91) is an example of a first notification section that informs the person that the operation of the air conditioner (100) is to be urged. In step S23, the display section (91) prompts the user to operate the air conditioner (100) normally using characters, graphics, symbols, signs, or the like. A person who has confirmed the display (91) causes the air conditioner (100) to operate normally by operating the operation section (92).

In the normal operation of modification 4, for example, the first operation, second operation, third operation, or fourth operation is performed. Moreover, in the normal operation of Modification 4, the fifth operation may be performed. Alternatively, in the operation of modification 4, an operation similar to the preliminary operation described in modification 2 may be performed. Alternatively, in the operation of modification 4, an operation similar to the preliminary operation described in modification 3 may be performed.

The first reporting unit may be a light-emitting unit such as an LED that uses light to prompt normal operation of the air conditioner (100). The first notification section may be a sound generation section that prompts the normal operation of the air conditioner (100) with a sound such as voice.

The first notification section such as the display section (91) may be provided in the second control unit (190). In this case, when the first condition is satisfied in step ST21, the display section (91) of the air conditioner (100) prompts the user to operate the air conditioner (100) normally.

(7-5) Modification 5
The second control section (191) of Modification 5 outputs information about the performance of the gas separation membrane (124). Control regarding this operation will be described in detail with reference to FIG. The control according to FIG. 19 is added to the air conditioner (100) of the embodiment described above. In other words, the air conditioner (100) of Modification 5 performs an operation (second operation) of outputting information about the performance of the gas separation membrane (124) in addition to the first operation.

At step ST31, the second control section (191) causes the air conditioner (100) to perform preliminary operation. In step ST32, the second control section (191) estimates information about the performance of the gas separation membrane (124). Specifically, the second control section (191) estimates the time until the performance of the gas separation membrane (124) recovers.

The second control unit (191) stores data indicating the relationship between the speed change of the internal pressure of the gas separation membrane (124) and the elapsed time of the preliminary operation. While the pore diameter of the gas separation membrane (124) is small immediately after the start of the preliminary operation, the pore diameter gradually increases as the preliminary operation is performed. As the preliminary operation progresses, the pores become sufficiently large, and the rate of change in the diameter of the pores becomes small. Therefore, the amount of decrease in the internal pressure of the gas separation membrane (124) is relatively large immediately after the start of the preliminary operation, and then gradually decreases. That is, immediately after the start of the preliminary operation, the rate of decrease of the internal pressure of the gas separation membrane (124) is relatively high, and then the rate of decrease gradually decreases. Therefore, if the rate of decrease of the internal pressure of the gas separation membrane (124) at a certain timing is known, it is possible to estimate how long it will take for the performance of the gas separation membrane (124) to recover.

Specifically, in step ST32, the second control section (191) obtains the decrease speed of the pressure detection value of the second pressure sensor (162) at a predetermined timing after starting the preliminary operation. The second control section (191) estimates the time or time until the performance of the gas separation membrane (124) recovers based on this rate of decrease and the above data. In step ST32, when obtaining the rate of decrease of the internal pressure of the gas separation membrane (124), basically, the second control section (191) adjusts the degree of opening of the second pressure control valve (172). not performed.

In step S33, the second control unit (191) outputs information about the estimated time and time as information about the performance of the gas separation membrane (124). The second control section (191) outputs this information to the first control section (93) of the first control unit (90). The first control section (93) having received this information controls the display section (91) so as to inform people of this time. The display section (91) is an example of a second notification section that informs a person of information regarding the performance of the gas separation membrane (124). In step S34, the display section (91) displays the time and time until the performance of the gas separation membrane (124) recovers, using characters, graphics, symbols, signs, and the like. In this way, a person can know the time and time until the performance of the gas separation membrane (124) recovers through the display section (91). Therefore, the reliability of the air conditioner (100) can be ensured.

The second reporting unit may be a light emitting unit that uses light to notify people of information about the performance of the gas separation membrane (124). The second notification part may be a sound generation part that notifies a person of information regarding the performance of the gas separation membrane (124) by means of sound such as voice.

A second notification section such as the display section (91) may be provided in the second control unit (190). In this case, in step ST27, the display section (91) of the air conditioner (100) informs the person of information regarding the performance of the gas separation membrane (124).

In this example, the information about the performance of the gas separation membrane (124) is the time and time until the performance of the gas separation membrane (124) recovers, but this information is the performance of the gas separation membrane (124) itself. It may be the degree of deterioration of the performance of the gas separation membrane (124).

(7-6) Modification 6
The fifth switching valve (155) according to the embodiment is omitted from the air conditioner (100) of Modified Example 6 shown in FIG. In Modified Example 6, the air supplied into the storage always flows through the introduction channel (107) and the water supply channel (108) and is sent to the storage space (5). In other words, in Modification 6, the introduction passageway (107) and the water supply passageway (108) form part of the air supply trunk passageway (102c).

(8) Reference Example The air conditioner (100) of Reference Example does not perform the first operation according to the embodiment and Modifications 1-4. In other words, the air conditioner (100) of the reference example does not perform an operation to suppress deterioration of the performance of the gas separation membrane (124) due to the suspension of the air conditioner (100) for a predetermined period. The air conditioner (100) of the reference example performs the second action according to the fifth modification. This allows a person to know information about the performance of the gas separation membrane (124). Therefore, the reliability of the air conditioner (100) can be ensured.

(9) Other Embodiments The pressurizing section may be other than the air pump (110), and may be a compressor that compresses air or a fan that conveys air.

In the air conditioner (100) of the embodiment, the fifth switching valve (155) may be omitted.

The air conditioner (100), transport refrigeration system (10), or transport container may have a rechargeable auxiliary power source such as a battery. The auxiliary power supply is configured to be able to supply power to the air conditioner. Electric power can be supplied from the auxiliary power source to the air conditioner (100) even when the air conditioner (100) is powered off and the air conditioner (100) is stopped. As a result, even when the air conditioner (100) is in a stopped state, the air conditioner (100) can reliably perform the preliminary operation.

The shipping container (1) may be used for land transportation. In this case, the shipping container (1) is transported by land transport such as a vehicle. Specifically, the shipping container (1) is loaded onto a trailer.

The air conditioner (100) may be used in stationary warehouses to adjust the composition of the air inside the warehouse. For example, the air conditioner (100) may be provided in a warehouse for storing perishables such as fruits, vegetables, and flowers. In this case, a storage space (5) is formed as an internal space for storing objects to be stored in the warehouse.

Although the embodiments and modifications have been described above, it will be understood that various changes in form and details are possible without departing from the spirit and scope of the claims. Moreover, the elements of the above embodiments, modifications, and other embodiments may be appropriately combined or replaced.

The descriptions of "first", "second", "third", etc. described above are used to distinguish the words and phrases to which these descriptions are given, and the number and order of the words and phrases are also limited. not something to do.

As described above, the present disclosure is useful for air conditioners, refrigerators, and shipping containers.

REFERENCE SIGNS LIST 1 shipping container 2 container body 5 internal space 6 external space 10 refrigerating device 30 refrigerant circuit 100 air conditioning device 103 exhaust flow path 110 air pump (pressurizing unit)
111 first water separator (dehumidifying section)
113 second water separator (dehumidifying section)
124 gas separation membrane 130 water separation module (dehumidifying section)
175 heating unit 191 control unit

Claims

An air conditioning device that adjusts the composition of the air inside the inside space (5),
a gas separation membrane (124) supplied with air to be treated;
A control unit (191) for executing a first operation for suppressing deterioration of the performance of the gas separation membrane (124) due to stoppage of the air conditioner for a predetermined period of time.
The air conditioner according to claim 1, wherein the first operation includes a preliminary operation of supplying the air to be treated to the gas separation membrane (124).
The air conditioner according to claim 2, wherein the control unit (191) starts the preliminary operation after a predetermined time has elapsed since the air conditioner was stopped.
The air conditioner according to claim 2, wherein the control unit (191) starts the preliminary operation a predetermined time before the start of normal operation of the air conditioner.
5. The method according to claim 3 or 4, further comprising an exhaust passage (103) for discharging the first air and the second air separated by the gas separation membrane (124) to the outside space (6) in the preliminary operation. air conditioner.
The air conditioner according to any one of claims 3 to 5, further comprising a heating section (175) for heating the air supplied to the gas separation membrane (124) in the preliminary operation.
The air conditioner according to any one of claims 3 to 6, further comprising a pressurizing section (110) that pressurizes the air supplied to the gas separation membrane (124) in the preliminary operation.
The air conditioner according to any one of claims 3 to 7, further comprising a dehumidifying section (111, 113, 130) that reduces moisture in the air supplied to the gas separation membrane (124) in the preliminary operation.
The air conditioner according to any one of claims 1 to 8, wherein the first action includes an action for prompting a person to operate the air conditioner.
The air conditioner according to any one of claims 1 to 9, wherein the control section (191) outputs information regarding the performance of the gas separation membrane (124).
An air conditioner (100) according to any one of claims 1 to 10;
A refrigerating device comprising a refrigerant circuit (30) that adjusts the temperature inside the internal space (5).
a refrigeration system (10) according to claim 11;
A container for transportation, comprising a container body (2) in which the refrigeration system (10) is provided.